s-35190a Seiko Instruments Inc., s-35190a Datasheet - Page 23

• Manufacturer Part Number: s-35190a
• Description: 3-wire Real-time Clock
• Manufacturer: Seiko Instruments Inc.

Rev.2.4
*1. If users clear INT1AE/INT2AE once; “L” is not output from the INT pin by setting INT1AE/INT2AE enable again, within
*2. If turning the alarm output on by changing the program, within the period when the alarm time matches real-time data,
INT1AE / INT2AE
2. Output of user-set frequency
Status register 2 setting
• Alarm 1 interrupt
• Alarm 2 interrupt
Alarm setting of “H (hour)”
The output of user-set frequency is the function to output the frequency which is selected by using data, from the INT pin,
in the AND-form. Set up the data of frequency in the INT register 1.
Refer to “4. INT register 1 and INT register 2” in “ Configuration of Register” .
INT pin
Real-time data
Status register 2 setting
32kE = 0, INT1AE = Don’t care (0 or 1), INT1ME = 0
INT1FE
32kE = 0, INT1ME = INT1FE = 0
a period when the alarm time matches real-time data.
None
“L” is output again from the INT pin when the minute is counted up.
_00
INT pin
Free-run output starts
Alarm time matches
Change by program
(H − 1) h 59 m 59 s
Figure 28 Output Timing of User-set Frequency
Second Minute Hour
Figure 27 Alarm Interrupt Output Timing (2/2)
Real-time data
INT register 1
INT register 2
H h 00 m 00 s
mx Hx Wx Dx Mx
INT register x alarm enable flag
• AxWE = AxmE = “0”, AxHE = “1”
Change by program
OFF
Seiko Instruments Inc.
Comparator
the week
Day of
01 s
Period when alarm time matches
Day Month Year
Change by program
*1
59 s
Yx
Alarm time
matches
H h 01 m 00 s
Change by program
Alarm interrupt
*2
3-WIRE REAL-TIME CLOCK
OFF
Change by program
OFF
H h 59 m 59 s
*1
(H + 1) h 00 m 00 s
S-35190A
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